Related items
Showing items related by metadata.
-
ArticleResponses to water scarcity in six sclerophyllous species established in a dry and burned site in central Chile
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.In this study, we investigated the responses to water scarcity after the post-transplant shock in six sclerophyllous species established in a Mediterranean-type climate site severely burned by fire. Seedlings of the species Acacia caven, Lithraea caustica, Quillaja saponaria, Escallonia pulverulenta, Peumus boldus and Colliguaya odorifera were cultured in the nursery on 140 mL pots and then planted in the field under tree shelters and submitted to two irrigation treatments during summer (2 L-1 week-1 seedling-1 cf. no watering). Species differed by irrigation treatment in survival, stomatal conductance, and transpiration, with P. boldus and E. pulverulenta exhibiting the lowest values in the treatment with no watering. This suggests that young seedlings of both species have not the capacity to survive during dry summers in Mediterranean-type climates unless irrigations are increased in frequency and quantity. Keywords: Outplanting survival; Mediterranean-type climate; gas exchange; forest restoration; burn severity ID: 3624041 -
ArticleValidating viability of Melia volkensii seeds stored as extracted seeds or nuts for production of high-quality germplasm in domestication and conservation of dryland tree species
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Development and supply of superior germplasm is important for the promotion of tree planting. Kenya has lost many tree seed sources through deforestation, land degradation, forests encroachment and conversion of agricultural land to housing. Nevertheless, limited access to tree seeds of high quality is the major constraint to sustainable tree production in Kenya and proper information on storability of extracted seeds is lacking. Melia volkensii trees species is highly valued in drylands of Kenya for tremendous roles in social-economic, ecological and environmental protection, and conservation. This experiment aims at determining viability test of Melia seeds stored as nut over period of one year and the resultant effect that they will have on seed germination. Furthermore, the research investigates the conducive environment that would favor storage of Melia seeds in order to improve its viability status. The experiment showed that Melia seeds stored at room temperature and a temperature of 4 degrees centigrade had higher germination capacities compared to Melia seeds stored at a temperature of -20 degrees centigrade. The peak average germination speed was 2.11 with a germination value of 3.99. Significant (p value ≤ 0.001) differences were observed in the germination capacities between Melia stored as seeds and nuts for the first, second, third, fourth, fifth, sixth and seventh germinations (p value ≤ 0.05). From the study, Melia stored as seeds at a temperature of 4 degrees centigrade had the highest marginal germination capacity. This study provides the best information for storage and handling of Melia seeds in maintaining its viability. Keywords: Germplasm, viability, conservation, Climate change, dryland species, Melia volkensii ID: 3623818 -
DocumentPatula pine (Pinus patula) cones opening under different treatments for rapid seed extraction in Londiani, Kenya
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Seed extraction from pines is challenging to the forestry sector globally. This is usually contributed by the pine cone anatomy that opens through a function of temperature and humidity which varies widely in the pine growing regions of the world and the Pinus species as observed in previous works done on Pinus roxburghii, Pinus halepensis, Pinus wallichiana, Pinus pinaster, Pinus radiata, and Pinus sylvestris. This study sought to reduce the extraction time and improve the extraction efficiency of Pinus patula seed in Kenya. The experimental design used was two factorial design with replicates of twenty cones randomly picked per treatment. Data analysis was analyzed through ANOVA with a Pvalue of 0.05. We present evidence that soaking does not influence the opening of cones and seed yield for the optimum temperature which the study determined to be 65°C. We also present evidence that, for rapid seed extraction, the temperature 65°C with an exposure period of between 4 and 24 h is significantly effective. This study presents a new understanding of rapid seed extraction, which contributes to one of the Kenya Forestry Research Institute’s strategic objectives of generating technologies for enhanced production of superior germplasm for priority tree species. Keyword: Research ID: 3469689
Users also downloaded
Showing related downloaded files
No results found.